Silo.



F. O. HELLSTROM.

SILO.

APPLICATlON FILED JULY 13.1915.

Patented Dec. 31, 1918.

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FRANK O. HELLSTBOM, OF BISMARCK, NORTH DAKOTA.

SILO.

To all whom it may concern:-

Be it known that I, FRANK O. HELLSTROM, a citizen of the United States,residing at Bismarck, in the county of Burleigh and State of NorthDakota, have invented a new and useful Silo, of which the following is aspecification.

The device forming the subject matter of this application is a frostproof and heat proof structure embodied in the present 1n stance in theform of a silo, and one object of the present invention is to provide adevice of this type embodying blocks of a novel form, which blockscooperate to define dead air passages in the walls of the silo.

Another object of the invention is to im prove the door construction ofthe silo.

A further object of the invention is to provide novel means for bindingtogether the constituent parts of the wall, and to provide a series ofelements which, at once, serve to space apart the constituent members ofthe wall and to support the reinforcing element whereby the aforesaidbinding is effected.

A further object of the invention'is to pro vide a structure of theclass described in which the members which bind together the constituentparts of the wall may be used either to define vertically separated,circumferentially continuous, dead air spaces, or to define verticallycommunicating air spaces extending from the top of the silo to thebottom thereof.

With the above and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made with in thescope of what is claimed, Without departing from the spirit of theinvention.

In the accompanying drawings Figure 1 shows in front elevation, a siloembodying the present invention;

Fig. 2 is a cross section of a silo embodying the invention;

Fig. 3 is a fragmental perspective showing a portion of the wall;

Figs. 4 and 5 are detailed perspectives illustrating the various formsof blocks whilch enter into the construction of the wal Fig. 6 is adiagrammatic plan of the rein- Specification of Letters Patent.

Application filed July 13, 1915.

Patented Dec. 31, 1918.

Serial No. 39,653.

forcement which binds together the constituent parts of the wall;

Fig. 7 is a fragmental perspective showing a modified form of theinvention;

Fig. 8 is a top plan showing a modified form of reinforcement;

Fig. 9 is a fragmental perspective illustrating a modified form of theinvention.

The structure forming the subject matter of this application preferablycomprises inner blocks 1 and Outer blocks 2. The blocks 1 and2 may befashioned from concrete or any other suitable material. The inner blocks1 may have outwardly projecting lugs 3 attheir upper corners, and theouter blocks 2 may have inwardly projecting lugs 4L at their uppercorners. The blocks 1 and 2 are erected in horizontal courses on asuitable foundation 5, the lugs 3 of the inner blocks 1 abutting againsteach other in adjoining blocks as shown at 6, and the lugs 4t of theouter blocks 2 abutting against each other in adjoining blocks asshownat 7. As indicated at 8, the lugs 3 of adjoining inner blocks 1abut against the outer blocks 2, between the lugs 4, the inwardlyprojecting lugs 4. of the blocks 2 abutting against the blocks 1 betweenthe lugs 3 on the blocks 1. Owing to the construction above outlined,the wall of the silo embodies aplurality of dead air spaces 10 and theconstruction is such that the blocks 1 and 2 may be shiftedcircumferentially with respect to each other, whereby the vertical orupright edges 12 of the blocks 1 may be disposed in break joint orderwith respect to the vertical or upright edges 14: of the outer blocks 2.

Interposed between the respective courses of blocks 1 and 2 is aforaminous reinforcement 11 which may be a section of expanded metal,wire netting or the like, the reinforcement serving to bind the parts ofthe wall together, without interfering with the communication betweenthe various parts of the dead air chambers.

Certain of the wall forming blocks are beveled to form projecting angles15 defining the edges of a door opening, such edges receiving a frame 16of V-shaped cross section, the frame 16 embodying protruding angles 17.The door preferably is made up of a pair of sections 18 constructedsubstantially like the blocks 1 and 2, these sections being beveled asindicated at 19 to define rentrant angles receiving the protrudingangles 17 of the frame 16. The door'forming sections 18 are united. bymeans of a clamping device which may be in the form of a bolt 20, thehead of the bolt being countersunk into the rearmost door section andthe forward end of the bolt being provided with a lever nut 22 whichbears against the outermost door section. In Fig. 2 of the drawings, therecess in which the bolt head is mounted, is shown at 21.

It will be understood readily that by tightening up the bolt and nutstructure 20-22, tllle door sections 18 will be held securely in p ace.

The door sections may carry steps 23 and if desired, steps 25 may bemounted between certain of the courses in the wall of the silo.

An upright frame 2 1 may be attached to the wall of the silo adjacentthe doors, the frame, denoted by the numeral 24, being adapted toreceive landings coacting with the respective doors. In Fig. 1 of thedrawings, the frame has been omitted, for the sake of clearness indisclosing the silo proper, the frame above mentioned being common andwell known.

As shown in Fig. 7 the silo is made up of hollow tiles 100, thereinforcement appearing as shown at 101.

As delineated in Fig. 8, the reinforcement may be in the form of a thin,crossed metallic strip 102.

The reinforcing member, whatever be its "form, not only binds the innerand outer parts of the wall together, but also strengthens the structureso that it will stand lateral strains, the bursting of the silo wallreinforcing member may be a continuous sheet 500, devoid of openings. Inthis form of the invention, the air spaces defined by the. reinforcingsheets 501 and the blocks- 500 are separated from each other vertically.Those skilled in the art will understand that more than two walls may beemployed, the

structure above alluded to involving a mere duplication of what isdisclosed in the drawings and meriting neither extended expla-- nationnor specific delineation. 7

Having thus described the invention, what is claimed is In a building, awall made up of superposed courses of inner and outer blocks, the innerblocks being provided with outwardly projecting corner spacing lugswhich engage the outer blocks, the outer blocks being provided withinwardly projecting corner spacing lugs which engage the inner blocks,whereby the blocks are held spaced with a minimum surface contact toprovide air spaces between the inner and outer blocks.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

FRANK O. HELLSTROM.

Witnesses:

L. A. FLoREN, F. E. MGCURDY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

